Strange stars with different quark mass scaling (1007.4737v2)

Abstract: We investigate the stability of strange quark matter and the properties of the cor- responding strange stars, within a wide range of quark mass scaling. The calculation shows that the resulting maximum mass always lies between 1.5M_{sun} and 1.8M_{sun} for all the scalings chosen here. Strange star sequences with a linear scaling would sup- port less gravitational mass, and a change (increase or decrease) of the scaling around the linear scaling would lead to a higher maximum mass. Radii invariably decrease with the mass scaling. Then the larger the scaling, the faster the star might spin. In addition, the variation of the scaling would cause an order of magnitude change of the strong electric field on quark surface, which is essential to support possible crusts of strange stars against gravity and may then have some astrophysical implications.